This Pilot G205 retractable pen features gel ink for smooth writing and improved ink flow. The pen has a convenient retractable design with a cushioned rubber grip for comfort even over protracted periods of writing. The ink is refillable, acid free and suitable for archival use. The pen has a fine 0.5mm nib, which writes a 0.3mm line width and also features a translucent barrel, allowing you to monitor remaining ink levels.